13221231280373 has 2 divisors, whose sum is σ = 13221231280374. Its totient is φ = 13221231280372.

The previous prime is 13221231280331. The next prime is 13221231280393. The reversal of 13221231280373 is 37308213212231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8334757452004 + 4886473828369 = 2886998^2 + 2210537^2 .

It is a cyclic number.

It is not a de Polignac number, because 13221231280373 - 2¹⁰ = 13221231279349 is a prime.

It is a super-2 number, since 2×13221231280373² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221231280393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610615640186 + 6610615640187.

It is an arithmetic number, because the mean of its divisors is an integer number (6610615640187).

Almost surely, 2^{13221231280373} is an apocalyptic number.

It is an amenable number.

13221231280373 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221231280373 is an equidigital number, since it uses as much as digits as its factorization.

13221231280373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 13221231280373 in words is "thirteen trillion, two hundred twenty-one billion, two hundred thirty-one million, two hundred eighty thousand, three hundred seventy-three".